1057243513 has 4 divisors (see below), whose sum is σ = 1085817700. Its totient is φ = 1028669328.

The previous prime is 1057243489. The next prime is 1057243519. The reversal of 1057243513 is 3153427501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399680064 + 657563449 = 19992^2 + 25643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057243513 - 2²⁵ = 1023689081 is a prime.

It is a super-2 number, since 2×1057243513² = 2235527691561162338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057243519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14287038 + ... + 14287111.

It is an arithmetic number, because the mean of its divisors is an integer number (271454425).

Almost surely, 2^1057243513 is an apocalyptic number.

It is an amenable number.

1057243513 is a deficient number, since it is larger than the sum of its proper divisors (28574187).

1057243513 is an equidigital number, since it uses as much as digits as its factorization.

1057243513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28574186.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1057243513 is about 32515.2812228343. The cubic root of 1057243513 is about 1018.7282346059.

The spelling of 1057243513 in words is "one billion, fifty-seven million, two hundred forty-three thousand, five hundred thirteen".